Movement detection from composite color television signals

Abstract

This paper describes a movement detection method derived from composite color television signals. IDTV, which improves the picture quality of conventional color TV signals, utilizes motion adaptive processing with frame memories. Signals combining the low frequency components of an NTSC interframe difference and a two-frame difference includes good motion information without miss-detection in stationary areas. A PAL interframe difference signal sampled by a proper phase also represents good motion information with no miss-detection. Motionlessness in moving areas is reduced by interfield processing of motion information. A recursive temporal and spatial filter with a field delay loop performs this purpose. Edge-adaptive control of the recursive filter output indicates good performance for reducing over-detection around the edges.